US20030133061A1 - Liquid crystal display panel - Google Patents
Liquid crystal display panel Download PDFInfo
- Publication number
- US20030133061A1 US20030133061A1 US10/308,643 US30864302A US2003133061A1 US 20030133061 A1 US20030133061 A1 US 20030133061A1 US 30864302 A US30864302 A US 30864302A US 2003133061 A1 US2003133061 A1 US 2003133061A1
- Authority
- US
- United States
- Prior art keywords
- reflection layer
- liquid crystal
- substrate
- display panel
- crystal display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 24
- 239000000758 substrate Substances 0.000 claims abstract description 30
- 229910052779 Neodymium Inorganic materials 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 230000035515 penetration Effects 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133553—Reflecting elements
- G02F1/133555—Transflectors
Definitions
- the invention relates to a liquid crystal display (LCD) panel, in particular to a LCD panel capable of enhancing a light utilization and penetration.
- LCD liquid crystal display
- the conventional penetration LCD panel 10 includes a first substrate 11 , a second substrate 12 , a liquid crystal layer 13 , a first polarizer 16 , a second polarizer 17 and a plurality of pixel electrodes in which each pixel electrode contains a reflection area 14 and a penetration area 15 as shown in FIG. 1.
- An incident light of a back light source 18 passes through the LCD panel 10 to hereby display the picture recognizable by naked eyes.
- the path of the incident light into the liquid crystal layer 13 of the back light source 18 can be expressed by paths a, a′ and a path b. Although part of the incident lights can directly penetrates by passing through area 15 as shown in path b.
- 6,195,140 discloses a LCD panel 20 providing a first substrate 21 , a second substrate 22 , a liquid crystal layer 23 , a reflection area 24 with uneven surface and a penetration area 25 as shown in FIG. 2, while it is not significant to improve the utilization efficiency of surrounding light sources and back light source.
- U.S. Patent Publication No. 2001/0017679A1 discloses a LCD panel 30 , in which a reflection layer 39 is installed under a second polarizer 37 so that the incident light of the back light source 38 can further reflect, making it capable of passing through the penetration area 35 without being directly blocked by the reflection area 34 or absorbed by the second polarizer 37 as shown in path c.
- part of light sources are consumed by the obstruction of the reflection area 34 as shown in path d and as it is necessary to further coat a reflection layer 39 under the polarizer 37 , an alignment defect and so on resulted in the production process make the manufacturing process more uncontrollable.
- the goal of the invention provides a LCD panel with a higher light efficiency so that the penetration rate increases but its reflection rate won't be reduced.
- the invention discloses a LCD panel, including a first substrate, a second substrate, a liquid crystal layer installed in between the first substrate and the second substrate, a plurality of pixel electrodes, in which each pixel electrode contains a plurality of protruded blocks, in which each protruded block includes a first reflection layer installed over the surface of the second substrate and is in a shape of hollow arc with an opening over the center of the arc, and a second reflection layer embedded in the surface of the second substrate and installed right beneath the opening of the first reflection layer.
- the incident light of the back light source can pass through the opening of the first reflection layer by utilizing double reflection effects, making the originally blocked incident light by reflection layer once again become a penetrating light to increase the light utilization.
- FIG. 1 shows a cross sectional view of prior LCD panels
- FIG. 2 shows another cross sectional view of prior LCD panels
- FIG. 3 shows another cross sectional view of prior LCD panels
- FIG. 4 shows a cross sectional view of a LCD panel of one embodiment according to the present invention
- FIG. 5 shows a top view of a LCD panel of one embodiment according to the present invention.
- FIG. 6 shows a hint diagram of a reflection theorem of LCD panels according to the present invention.
- FIG. 4 shows a cross sectional view of a LCD panel of one embodiment according to the present invention, including a first substrate 41 , a second substrate 42 , a liquid crystal layer 43 and a plurality of pixel electrodes (not shown).
- the liquid crystal layer 43 is installed in between the first substrate 41 and the second substrate 42 and each pixel electrode comprises a plurality of protruded blocks 44 .
- Each protruded block 44 contains a first reflection layer 45 and a second reflection layer 46 .
- the first reflection layer 45 is installed on top of the surface of the second substrate 42 and is in a shape of an arc with an opening 453 over the arc center.
- the first reflection layer 45 provides a first surface 451 and a second surface 452 , in which the first surface 451 is used to reflect surrounding light sources while the second surface 452 is used to reflect the incident light sources.
- the second reflection layer 46 is embedded in the surface of the second substrate 42 and is under the opening 453 of the first reflection layer 45 .
- the first reflection layer 45 and the second reflection layer 46 are made from the materials with conductivity and high reflection rate, which can be chosen from the following groups, aluminum, silver, gold, neodymium and their alloy.
- the opening 453 of the first reflection layer 45 and the shape of the second reflection layer 46 are not subject to any rule. The better one is in shapes of rectangular, circular or square.
- the surfaces of the first reflection layer 45 and the second reflection layer 46 are smooth planes or concaved planes to facilitate the reflection or focusing.
- FIG. 5 shows a top view of a LCD panel of one embodiment according to the present invention, which uses the opening 453 of each protruded block 44 as the penetration area, thus the incident light from the back light source can penetrate through opening 453 and the drawback of lower light utilization in prior arts as a result of obstruction of reflection layer can be avoided.
- FIG. 6 shows a hint diagram of a reflection theorem of LCD panels according to the present invention.
- the incident light from back light source penetrates the opening 453 of the first reflection layer 45 by means of double reflections.
- the incident light from the back light source will go through the second surface 452 of the first reflection layer 45 for the first reflection to the surface of the second reflection layer 46 and go through the second reflection layer 46 for the second reflection penetrating through the opening 453 . Therefore, the incident light consumed by the obstruction of the reflection area in prior arts can be further reflected to form a penetration light.
- the penetration rate of the present invention can be achieved by three times of prior art.
- the penetration rate of the invention can be controlled with the arc of the first reflection layer 45 , a distance between the second reflection layer 45 and the opening 453 and the size of the second reflection layer 45 and the opening 453 .
- it is not subject to any limitation in the invention.
- the distance between the opening 453 of the first reflection layer 45 and the second reflection layer 46 is located at about 1 ⁇ 3 to 2 ⁇ 3 of the focal length of the first reflection layer 45 and is better yet located at 1 ⁇ 2 focal length of it.
- the width of the opening 453 of the first reflection layer 45 and the width of the second reflection layer 46 can be roughly set up as the same.
- the widths of the opening 453 and the second reflection layer 46 are in between 1 ⁇ 3 to 2 ⁇ 3 the radius of the first reflection layer 45 and are better yet 1 ⁇ 2 the radius of the reflection layer 45 .
Abstract
Description
- 1. Field of the Invention
- The invention relates to a liquid crystal display (LCD) panel, in particular to a LCD panel capable of enhancing a light utilization and penetration.
- 2. Description of Related Art
- The conventional
penetration LCD panel 10 includes afirst substrate 11, asecond substrate 12, aliquid crystal layer 13, afirst polarizer 16, asecond polarizer 17 and a plurality of pixel electrodes in which each pixel electrode contains areflection area 14 and apenetration area 15 as shown in FIG. 1. An incident light of aback light source 18 passes through theLCD panel 10 to hereby display the picture recognizable by naked eyes. The path of the incident light into theliquid crystal layer 13 of theback light source 18 can be expressed by paths a, a′ and a path b. Although part of the incident lights can directly penetrates by passing througharea 15 as shown in path b. However, when incident lights are beneath thereflection area 14, a small portion of those will penetrate by passing through anarea 15 as a result of thereflection area 14 and the reflection effect of theback light source 18, while they will be weakened due to the absorption of thesecond polarizer 17 in reflection process as shown in path a. Moreover, most of the incident lights under thereflection area 14 are exhausted due to the obstruction of thereflection area 14 or the absorption of thesecond polarizer 17 as shown in path a′. In general, the penetration rate of conventional halfpenetration LCD panels 10 is about 25%. A U.S. Pat. No. 6,195,140 discloses aLCD panel 20 providing afirst substrate 21, asecond substrate 22, aliquid crystal layer 23, areflection area 24 with uneven surface and apenetration area 25 as shown in FIG. 2, while it is not significant to improve the utilization efficiency of surrounding light sources and back light source. - In addition, U.S. Patent Publication No. 2001/0017679A1 discloses a
LCD panel 30, in which areflection layer 39 is installed under asecond polarizer 37 so that the incident light of theback light source 38 can further reflect, making it capable of passing through thepenetration area 35 without being directly blocked by thereflection area 34 or absorbed by thesecond polarizer 37 as shown in path c. Inevitably, part of light sources are consumed by the obstruction of thereflection area 34 as shown in path d and as it is necessary to further coat areflection layer 39 under thepolarizer 37, an alignment defect and so on resulted in the production process make the manufacturing process more uncontrollable. - The goal of the invention provides a LCD panel with a higher light efficiency so that the penetration rate increases but its reflection rate won't be reduced.
- To achieve the above goal and avoid the disadvantages of the conventional techniques, the invention discloses a LCD panel, including a first substrate, a second substrate, a liquid crystal layer installed in between the first substrate and the second substrate, a plurality of pixel electrodes, in which each pixel electrode contains a plurality of protruded blocks, in which each protruded block includes a first reflection layer installed over the surface of the second substrate and is in a shape of hollow arc with an opening over the center of the arc, and a second reflection layer embedded in the surface of the second substrate and installed right beneath the opening of the first reflection layer.
- As such, the incident light of the back light source can pass through the opening of the first reflection layer by utilizing double reflection effects, making the originally blocked incident light by reflection layer once again become a penetrating light to increase the light utilization.
- The present invention will be described according to the appended drawings in which:
- FIG. 1 shows a cross sectional view of prior LCD panels;
- FIG. 2 shows another cross sectional view of prior LCD panels;
- FIG. 3 shows another cross sectional view of prior LCD panels;
- FIG. 4 shows a cross sectional view of a LCD panel of one embodiment according to the present invention;
- FIG. 5 shows a top view of a LCD panel of one embodiment according to the present invention; and
- FIG. 6 shows a hint diagram of a reflection theorem of LCD panels according to the present invention.
- FIG. 4 shows a cross sectional view of a LCD panel of one embodiment according to the present invention, including a
first substrate 41, asecond substrate 42, aliquid crystal layer 43 and a plurality of pixel electrodes (not shown). Theliquid crystal layer 43 is installed in between thefirst substrate 41 and thesecond substrate 42 and each pixel electrode comprises a plurality ofprotruded blocks 44. - Each
protruded block 44 contains afirst reflection layer 45 and asecond reflection layer 46. Thefirst reflection layer 45 is installed on top of the surface of thesecond substrate 42 and is in a shape of an arc with an opening 453 over the arc center. Thefirst reflection layer 45 provides afirst surface 451 and asecond surface 452, in which thefirst surface 451 is used to reflect surrounding light sources while thesecond surface 452 is used to reflect the incident light sources. Thesecond reflection layer 46 is embedded in the surface of thesecond substrate 42 and is under the opening 453 of thefirst reflection layer 45. Thefirst reflection layer 45 and thesecond reflection layer 46 are made from the materials with conductivity and high reflection rate, which can be chosen from the following groups, aluminum, silver, gold, neodymium and their alloy. The opening 453 of thefirst reflection layer 45 and the shape of thesecond reflection layer 46 are not subject to any rule. The better one is in shapes of rectangular, circular or square. Furthermore, the surfaces of thefirst reflection layer 45 and thesecond reflection layer 46 are smooth planes or concaved planes to facilitate the reflection or focusing. - FIG. 5 shows a top view of a LCD panel of one embodiment according to the present invention, which uses the opening453 of each
protruded block 44 as the penetration area, thus the incident light from the back light source can penetrate through opening 453 and the drawback of lower light utilization in prior arts as a result of obstruction of reflection layer can be avoided. - FIG. 6 shows a hint diagram of a reflection theorem of LCD panels according to the present invention. The incident light from back light source penetrates the opening453 of the
first reflection layer 45 by means of double reflections. As far as the paths f and g are concerned, the incident light from the back light source will go through thesecond surface 452 of thefirst reflection layer 45 for the first reflection to the surface of thesecond reflection layer 46 and go through thesecond reflection layer 46 for the second reflection penetrating through the opening 453. Therefore, the incident light consumed by the obstruction of the reflection area in prior arts can be further reflected to form a penetration light. The penetration rate of the present invention can be achieved by three times of prior art. - The penetration rate of the invention can be controlled with the arc of the
first reflection layer 45, a distance between thesecond reflection layer 45 and the opening 453 and the size of thesecond reflection layer 45 and the opening 453. For this, it is not subject to any limitation in the invention. - In one embodiment of the invention, the distance between the opening453 of the
first reflection layer 45 and thesecond reflection layer 46 is located at about ⅓ to ⅔ of the focal length of thefirst reflection layer 45 and is better yet located at ½ focal length of it. In addition, the width of the opening 453 of thefirst reflection layer 45 and the width of thesecond reflection layer 46 can be roughly set up as the same. The widths of the opening 453 and thesecond reflection layer 46 are in between ⅓ to ⅔ the radius of thefirst reflection layer 45 and are better yet ½ the radius of thereflection layer 45. - The above-described embodiments of the present invention are intended to be illustratedive only. Numerous alternative embodiments may be devised by those skilled in the art without departing from the scope of the following claims.
Claims (14)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW090133494 | 2001-12-31 | ||
TW90133494A | 2001-12-31 | ||
TW090133494A TW510981B (en) | 2001-12-31 | 2001-12-31 | Liquid crystal display panel |
Publications (2)
Publication Number | Publication Date |
---|---|
US20030133061A1 true US20030133061A1 (en) | 2003-07-17 |
US6727969B2 US6727969B2 (en) | 2004-04-27 |
Family
ID=21680158
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/308,643 Expired - Fee Related US6727969B2 (en) | 2001-12-31 | 2002-12-03 | Liquid crystal display panel |
Country Status (3)
Country | Link |
---|---|
US (1) | US6727969B2 (en) |
JP (1) | JP3920210B2 (en) |
TW (1) | TW510981B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070153174A1 (en) * | 2005-12-29 | 2007-07-05 | Lg.Philips Lcd Co., Ltd. | Transflective type liquid crystal display device and a method for fabricating the same |
CN100390637C (en) * | 2005-01-20 | 2008-05-28 | 友达光电股份有限公司 | Semi-penetration and semi-reflection LCD panel,its prodn.method and method for improving backlight effifiency |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6798464B2 (en) * | 2001-05-11 | 2004-09-28 | International Business Machines Corporation | Liquid crystal display |
JP4844027B2 (en) * | 2004-07-16 | 2011-12-21 | カシオ計算機株式会社 | Vertical alignment type liquid crystal display element |
CN100476554C (en) * | 2004-08-31 | 2009-04-08 | 卡西欧计算机株式会社 | Vertical alignment active matrix liquid crystal display device |
US20060066791A1 (en) * | 2004-09-30 | 2006-03-30 | Casio Computer Co., Ltd. | Vertical alignment active matrix liquid crystal display device |
CN101604087A (en) | 2004-09-30 | 2009-12-16 | 卡西欧计算机株式会社 | Vertical alignment active matrix liquid crystal display device |
AU2005304336A1 (en) * | 2004-11-10 | 2006-05-18 | Avery Dennison Corporation | In-mold label film with foamed adhesive skin |
KR100752875B1 (en) * | 2004-11-29 | 2007-08-29 | 가시오게산키 가부시키가이샤 | Vertical alignment active matrix liquid crystal display device |
KR100752876B1 (en) * | 2004-11-30 | 2007-08-29 | 가시오게산키 가부시키가이샤 | Vertical-alignment liquid crystal display device |
US8068200B2 (en) | 2004-12-24 | 2011-11-29 | Casio Computer Co., Ltd. | Vertical alignment liquid crystal display device in which a pixel electrode has slits which divide the pixel electrode into electrode portions |
JP4639797B2 (en) * | 2004-12-24 | 2011-02-23 | カシオ計算機株式会社 | Liquid crystal display element |
US20070229744A1 (en) * | 2006-03-29 | 2007-10-04 | Casio Computer Co., Ltd. | Vertically aligned liquid crystal display device |
US7495258B2 (en) * | 2006-05-17 | 2009-02-24 | Tpo Displays Corp. | N-channel TFT and OLED display apparatus and electronic device using the same |
JP4866703B2 (en) * | 2006-10-20 | 2012-02-01 | 株式会社 日立ディスプレイズ | Liquid crystal display |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6195140B1 (en) * | 1997-07-28 | 2001-02-27 | Sharp Kabushiki Kaisha | Liquid crystal display in which at least one pixel includes both a transmissive region and a reflective region |
US20010017679A1 (en) * | 1999-12-06 | 2001-08-30 | Kyoung-Su Ha | Transflective liquid crystal display device |
US20020047970A1 (en) * | 2000-10-22 | 2002-04-25 | Hitachi, Ltd. | Liquid crystal display |
US6441873B2 (en) * | 1998-10-02 | 2002-08-27 | Koninklijke Philips Electronics, N.V. | Reflective liquid crystal display device having an array of display pixels |
-
2001
- 2001-12-31 TW TW090133494A patent/TW510981B/en not_active IP Right Cessation
-
2002
- 2002-12-03 US US10/308,643 patent/US6727969B2/en not_active Expired - Fee Related
- 2002-12-19 JP JP2002368985A patent/JP3920210B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6195140B1 (en) * | 1997-07-28 | 2001-02-27 | Sharp Kabushiki Kaisha | Liquid crystal display in which at least one pixel includes both a transmissive region and a reflective region |
US6441873B2 (en) * | 1998-10-02 | 2002-08-27 | Koninklijke Philips Electronics, N.V. | Reflective liquid crystal display device having an array of display pixels |
US20010017679A1 (en) * | 1999-12-06 | 2001-08-30 | Kyoung-Su Ha | Transflective liquid crystal display device |
US20020047970A1 (en) * | 2000-10-22 | 2002-04-25 | Hitachi, Ltd. | Liquid crystal display |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100390637C (en) * | 2005-01-20 | 2008-05-28 | 友达光电股份有限公司 | Semi-penetration and semi-reflection LCD panel,its prodn.method and method for improving backlight effifiency |
US20070153174A1 (en) * | 2005-12-29 | 2007-07-05 | Lg.Philips Lcd Co., Ltd. | Transflective type liquid crystal display device and a method for fabricating the same |
CN100456103C (en) * | 2005-12-29 | 2009-01-28 | 乐金显示有限公司 | Transflective type liquid crystal display device and a method for fabricating the same |
US7724329B2 (en) | 2005-12-29 | 2010-05-25 | Lg Display Co., Ltd. | Transflective type liquid crystal display device and a method for fabricating the same |
Also Published As
Publication number | Publication date |
---|---|
TW510981B (en) | 2002-11-21 |
JP3920210B2 (en) | 2007-05-30 |
JP2003241189A (en) | 2003-08-27 |
US6727969B2 (en) | 2004-04-27 |
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